国际顶尖MBA申请交流平台--TOPWAY MBA

标题: 请教几道机警题 [打印本页]

作者: lms800 时间: 2002-12-27 00:44 标题: 请教几道机警题

这几题帮忙看一下好么
X^A=Y^B=Z^C,X,Y,Z均为正整数,A,B,C均为大于1的整数,求X+Y+Z
(1)X^A=729
(2)A+B+C=11

80. 60 cars, either full-size or midsize or compact. 31 is white, 10 is red, 19 is blue, how many cars are full-size?
(1). No red and no blue cars are full-size.
(2). The number of full-size is greater than the sum of midsize and compact cars.

85. DS：一个数列，平均数与和的比
（1）共有8个数
（2）和为100
95. 【旧机经】有十个球，一个绿，一个蓝，依次取三个球不放回，求第一个是绿，其它二个不是蓝的概率
104．一道数据充分性的题目：a，b ，为正整数。求B=？
A：14A+B=86
B：B小于14。
122. x^2+bx+16 ，问B=？
A，B>0
B，x^2+bx+16=(x+C)^2

作者: tongxun 时间: 2002-12-27 01:23

1、C
80、A
85、C。题目很怪。
95、（1/10 * 8/9 * 7/8）/C10，2
104、C
122、不会。

作者: yyf_99 时间: 2002-12-27 02:06

95. Why it is not 1*10*8*9*7*8/ C10,3? Since 3 balls will be picked? Pls advise, I'm confused with statistics all the time.

[em13]

作者: yyf_99 时间: 2002-12-27 02:07

95. Why it is not 1/10*8/9*7/8 / C10,3? Since 3 balls will be picked? Pls advise, I'm confused with statistics all the time.

[em13]

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